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When the linecard resets, the "%SYS-5-MOD_NOSCPPINGRESPONSE" error message is displayed in the logs of a Cisco Catalyst 6500 Series Switch that runs CatOS

Core issue

The %SYS-5-MOD_NOSCPPINGRESPONSE: Module [dec] not responding... resetting module error message indicates that a module does not respond to the Supervisor Engine after three attempts to poll the module. [dec] represents the module number.

The Switch-Module Configuration Protocol (SCP) is the communication protocol from the active Supervisor to all the line cards. If the keepalives fail more than a certain amount, the Supervisor will trigger a reset of the modules.

Sometimes, the WS-X6148-45AF module can reset with this error:

2005 May 06 13:02:24 %SYS-5-MOD_NOSCPPINGRESPONSE:Module 9 not responding... resetting module
2005 May 06 13:02:24 %SYS-5-MOD_RESET:Module 9 reset from Software
2005 May 06 13:04:07 %SYS-5-MOD_OK:Module 9(WS-X6148-45AF,SAL08175TMG) is online

For more information, refer to Cisco bug ID CSCeh84332.

Bad hardware is not the reason for this reset. This problem occurs if one or more ports on a particular linecard flap abnormally with a high rate. Other causes for this may be traffic flooding the Ethernet Out Band Channel (EOC) where the keepalives are sent.

Resolution

To fix this issue, upgrade the Catalyst Operating System (CatOS) software to one of these versions or later:

  • 6.4(17.1)
  • 7.6(12.6)
  • 8.4(3.15)
  • 8.4(4)
  • 8.5(0.102)JAC
  • 8.5(0.46)RFW02
  • 8.5(0.46)ROC07
  • 8.5(0.46)ROC08
  • 8.6(0.106)TAL

As a workaround, check the link change counter in the output of the show counters mod/port command. A large number of link changes can cause the linecard to reset. Resolve the issue of frequent link changes to avoid a reset of the linecard.

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